Printing machine provided with limiting conveying structure and used for processing circuit board

Abstract

The invention relates to the technical field of circuit board printing, in particular to a circuit board processing printing machine with a limiting conveying structure, which comprises a working platform horizontally placed on the ground, a conveying belt is rotatably mounted on the upper surface of the working platform, and two limiting strips are fixedly mounted on the outer surface of the conveying belt. Special printing jigs are placed on the upper surface of the conveying belt at equal intervals, processing circuit boards needing to be printed are clamped in the printing jigs, and a limiting mechanism used for guaranteeing that the positions of the printing jigs do not deviate is arranged on the upper surface of the working platform. According to the printing machine provided with the limiting conveying structure and used for circuit board processing, the novel structural design is adopted, a limiting plate is made to be close to a printing jig through the magnetic adsorption effect, when the printing jig moves to a designated position, a clamping ball enters a clamping hole to form a clamping structure, and at the moment, even though a conveying belt still rotates, the printing jig cannot be driven to move; and the printing jig and the printing plate are aligned up and down.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board printing, in particular to a circuit board processing printer provided with a position limiting conveying structure. Background Art

[0002] Circuit board printing refers to printing conductive lines, markings and other necessary information on circuit boards. Printed circuit boards usually use screen printing technology, by coating conductive ink or conductive glue ink on the circuit board, and then using a screen printer to print the pattern onto the circuit board.

[0003] In the prior art, a Chinese patent with publication number CN209832885U discloses a circuit board printer, which relates to the technical field of circuit board printing equipment, including a workbench, a cleaning mechanism is provided at the feed end of the workbench, the cleaning mechanism includes a cleaning frame, the cleaning frame is connected to the workbench, the cleaning frame is provided with a lifting slot along the height direction of the cleaning frame, a first mounting block is slidably installed in the lifting slot, a first cleaning roller and a second cleaning roller are installed on the cleaning frame, the first cleaning roller is connected to the first mounting block, the second cleaning roller cleaning frame is rotatably connected, and a brush is connected to the peripheral side wall of the first cleaning roller and the second cleaning roller; a driving assembly is provided on the cleaning frame, the driving assembly is connected to the first mounting block; a transmission assembly is installed at the feed end of the cleaning frame, and a connecting assembly is installed at the discharge end of the cleaning frame. The utility model has the effect of cleaning dust on the surface of the copper clad plate.

[0004] During use, the above-mentioned device utilizes the rotation of the conveyor belt to transport the circuit board to be printed to the specified position, and then prints it. However, in actual use, the conveyor belt utilizes friction to rotate. After long-term use, the friction may be affected due to surface wear and other reasons, resulting in relative sliding between the conveyed object (i.e., the circuit board). At this time, there will be a certain error between the conveyed circuit and the printing mechanism, thereby affecting the accuracy of printing.

[0005] In the prior art, a Chinese patent with publication number CN211557642U discloses a circuit board printer, including a frame, a workbench, a printing board arranged above the workbench, and a scraper mechanism arranged above the printing board, a first mounting seat for mounting the circuit board is arranged on the workbench, the scraper mechanism includes a tool holder and a scraper mounted on the tool holder, the tool holder can be turned up and arranged on the frame, the frame is also provided with a positioning device for positioning the tool holder after the tool holder is turned up, the positioning device includes a second mounting seat arranged on the frame and a positioning rod for positioning the tool holder, the tool holder is provided with an articulated seat, and the tool holder is hingedly arranged with the second mounting seat via the articulated seat, and the second mounting seat is provided with an installation cavity for the articulated seat to rotate. With the above technical solution, the scraper mechanism of the printer can be repaired without disassembly, which is more convenient.

[0006] The above-mentioned device uses a scraper mechanism to print ink on the surface of the circuit board during use. However, in actual use, the surface of the circuit board may be contaminated with a certain amount of dust during transportation or handling. If the dust is not cleaned, it will affect the ink adhesion effect during subsequent printing.

[0007] For example, in the prior art, a Chinese patent with publication number CN220776171U discloses an automatic circuit board printer, including a conveying mechanism and a printing device. The conveying mechanism is provided with a clamping mechanism, and the clamping mechanism includes a support seat and a threaded sleeve. The support seat is provided with a limited position slide groove, and a bidirectional screw is provided in the limited position slide groove. An L-shaped pressing block is installed on the threaded sleeve, and a limited position slot is provided on the inner side wall of the L-shaped pressing block. The clamping mechanism in the printing device is composed of a bidirectional screw and an L-shaped pressing block with an elastic plate, and the L-shaped pressing block is symmetrical at an oblique angle. When the circuit board is placed at the center of the support seat, the bidirectional screw is driven to rotate by a stepping motor and a belt, thereby driving the L-shaped pressing blocks on both sides of the oblique angle to shrink inward, thereby achieving the effect of pressing and fixing the circuit board. The clamp can clamp circuit boards of different models without replacing the clamp, thereby improving the efficiency of circuit board printing.

[0008] The above-mentioned device can clamp circuit boards of different sizes using a clamp during use, but in actual use, the ink on the surface of the circuit board is in a flowable state just after printing (that is, the ink will not dry quickly), so the ink is easily smeared when the material is subsequently taken out. Summary of the invention

[0009] The purpose of the present invention is to provide a circuit board processing printer with a limit conveying structure to solve the problems mentioned in the above background technology that position deviation affects printing accuracy, dust affects ink adhesion, and ink cannot dry quickly.

[0010] To achieve the above object, the present invention provides the following technical solution: a circuit board processing printer with a limited conveying structure, comprising a working platform horizontally placed on the ground, a conveyor belt rotatably mounted on the upper surface of the working platform, and further comprising:

[0011] Two limit strips are fixedly installed on the outer surface of the conveyor belt, and a special printing jig is placed at equal intervals on the upper surface of the conveyor belt, and a processed circuit board to be printed is clamped inside the printing jig, and a limit mechanism for ensuring that the position of the printing jig does not deviate is provided on the upper surface of the working platform;

[0012] A longitudinally arranged fixed back plate is fixedly installed behind the upper surface of the working platform, a transverse printing plate is arranged on the front side of the fixed back plate, and a telescopic cylinder is fixedly installed between the printing plate and the fixed back plate;

[0013] An arched dust removal frame is fixedly installed on the right side of the upper surface of the working platform, and a dust removal mechanism for removing dust on the surface of the processed circuit board is installed inside the dust removal frame;

[0014] A drying rack is fixedly installed on the left side of the upper surface of the working platform, and a drying mechanism for drying ink on the surface of the processed circuit board after printing is arranged inside the drying rack.

[0015] Preferably, two smear scrapers are symmetrically and slidably mounted on the upper surface of the printing plate, and a threaded connection is passed through the rear end of the smear scraper and the transmission screw, and the transmission screw is driven to rotate by a drive motor fixedly mounted on the upper surface of the printing plate.

[0016] Preferably, the limiting mechanism comprises two limiting plates which are symmetrical front and back, and the positions of the limiting plates are vertically aligned with the positions of the printing plates, and the limiting plates form an elastic telescopic structure with the working platform through the extrusion springs fixedly mounted on the outer surfaces of the limiting plates.

[0017] Preferably, two engaging balls are rotatably mounted inside the limit plate, and the engaging balls are engaged with engaging holes provided on the side of the printing jig, and an electromagnet is fixedly mounted at the middle position of the outer surface of the limit plate.

[0018] Preferably, the dust removal mechanism includes a pressurized nozzle fixedly installed on the inner side of the dust removal frame and a dust-sticking plate made of double-sided adhesive material fixedly installed on the lower surface of the dust removal frame, and the pressurized nozzle forms a connecting structure with the first air bag fixedly installed on the upper surface of the printing board through a conveying hose.

[0019] Preferably, the drying mechanism comprises a drying nozzle rotatably mounted at a middle position of the lower surface of the drying rack, and the drying nozzle is communicated with the output pipe.

[0020] Preferably, the other end of the output tube is communicated with a heating box fixedly mounted on the front outer surface of the fixed back plate, and a heating tube structure is fixedly mounted inside the heating box.

[0021] Preferably, the heating box is connected to the second air bag fixedly installed on the upper surface of the printing plate through an input pipe fixedly installed on the front side of the heating box.

[0022] Preferably, a friction roller and a driving bevel gear are rotatably mounted on the inner side wall of the drying rack, and the driving bevel gear and the friction roller are connected by a first belt, and the friction roller is in contact with and rubbed against the upper surface of the conveyor belt.

[0023] Preferably, a driven bevel gear is rotatably mounted on the inner side of the upper end of the drying rack, and the driven bevel gear is meshed with the driving bevel gear, and the driven bevel gear drives the drying nozzle to rotate synchronously through a second belt.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the circuit board processing printer with a limit conveying structure adopts a new structural design, and its specific contents are as follows:

[0025] 1. Set up a limit mechanism. When the conveyor belt rotates to transport the printing jig, turn on the electromagnet and use the magnetic adsorption effect to make the limit plate close to the printing jig. When the printing jig moves to the specified position, the locking ball enters the locking hole to form a locking structure, thereby limiting the movement of the printing jig. At this time, even if the conveyor belt is still rotating, it will not drive the printing jig to move, ensuring that the position of the printing jig and the printing plate are aligned up and down;

[0026] Furthermore, the printed board squeezes the first airbag during the upward movement, so that the air inside the first airbag is ejected from the pressurized nozzle through the delivery hose, thereby utilizing the airflow to blow away the dust attached to the surface of the processed circuit board, thereby ultimately achieving the purpose of dust removal. The blown dust is adhered to the dust sticking plate on the lower surface of the dust removal frame, thereby preventing the dust from falling again on the surface of the subsequently processed circuit board.

[0027] 2. A drying mechanism is provided. When the printed board moves upward, the second airbag is squeezed. At this time, the air in the second airbag enters the heating box through the input pipe, and is heated inside the heating box and then ejected from the drying nozzle through the output pipe again, thereby achieving the purpose of drying the surface of the printed circuit board after printing, accelerating the drying speed of the printing ink, and avoiding the subsequent smudging of the printing ink;

[0028] Furthermore, during the rotation process, the conveyor belt utilizes the surface friction force to drive the friction roller to rotate, and the friction roller drives the driving bevel gear to rotate synchronously through the first belt, and then drives the drying nozzle to rotate under the transmission action of the driven bevel gear meshing with the driving bevel gear. The rotating drying nozzle can sweep a larger area, thereby making the drying more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the conveyor belt structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the positional relationship between the limiting plate and the printing jig of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the printing jig of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the printed board of the present invention;

[0034] Figure 6 It is a schematic diagram of the lower surface structure of the dust removal frame of the present invention;

[0035] Figure 7 This is a schematic diagram of the cross-sectional structure of the heating box of the present invention;

[0036] Figure 8 This is a schematic structural diagram of the positional relationship between the friction roller and the conveyor belt of the present invention;

[0037] Fig. 9 This is a schematic diagram of the lower surface structure of the drying rack of the present invention;

[0038] Fig.10 For the present invention Fig. 9 Enlarged structural diagram at A in the middle.

[0039] In the figure: 1. working platform; 2. conveyor belt; 201. limit strip; 3. printing jig; 4. processing circuit board; 5. fixed back plate; 6. printing board; 7. telescopic cylinder; 8. smear scraper; 9. transmission screw; 10. driving motor; 11. limit plate; 12. snap ball; 13. snap hole; 14. extrusion spring; 15. electromagnet; 16. dust removal rack; 17. pressurized nozzle; 18. dust sticking plate; 19. conveying hose; 20. first air bag; 21. drying rack; 22. drying nozzle; 23. output pipe; 24. heating box; 25. input pipe; 26. second air bag; 27. friction roller; 28. driving bevel gear; 29. ​​first belt; 30. driven bevel gear; 31. second belt. DETAILED DESCRIPTION

[0040] Example 1: Please refer to Figure 1-Figure 4 In order to solve the problem that the traditional device is offset during use and affects the printing accuracy, this embodiment provides the following technical solutions, wherein a limiting mechanism is set, and the limiting mechanism is used to limit the movement of the printing jig 3 during the conveying process, thereby avoiding its position offset. Specifically disclosed is: a working platform 1 is horizontally placed on the ground, a conveyor belt 2 is rotatably installed on the upper surface of the working platform 1, two limiting strips 201 are fixedly installed on the outer surface of the conveyor belt 2, and a dedicated printing jig 3 is placed on the upper surface of the conveyor belt 2 at equal intervals, and a processed circuit board 4 to be printed is clamped inside the printing jig 3, A limiting mechanism is provided on the upper surface of the working platform 1 to ensure that the position of the printing jig 3 does not shift. The limiting mechanism includes two limiting plates 11 that are symmetrical front and back, and the positions of the limiting plates 11 are aligned with the positions of the printing plates 6 up and down, and the limiting plates 11 form an elastic telescopic structure with the working platform 1 through an extrusion spring 14 fixedly installed on its outer surface. Two engaging balls 12 are rotatably installed inside the limiting plate 11, and the engaging balls 12 are engaged with the engaging holes 13 opened on the side of the printing jig 3, and an electromagnet 15 is fixedly installed in the middle position of the outer surface of the limiting plate 11.

[0041] When using the device, first place the processed circuit board 4 to be printed on the corresponding printing jig 3 for engagement, then place the printing jig 3 evenly and evenly on the upper surface of the conveyor belt 2 (at this time, the limit strip 201 on the outer surface of the conveyor belt 2 is used to limit the forward and backward movement of the printing jig 3), then the conveyor belt 2 rotates to transport the printing jig 3 from right to left, when the printing jig 3 passes through the limit plate 11 (the electromagnet 15 in the middle position of the outer surface of the limit plate 11 is turned on), the limit plate 11 is made close to and squeezes the printing jig 3 by magnetic adsorption, when the printing jig 3 moves to the specified position (that is, the position aligned with the printing plate 6), the engaging ball 12 on the side of the limit plate 11 corresponds to and engages with the engaging hole 13 on the outer surface of the printing jig 3, thereby limiting the movement of the printing jig 3, at this time, even if there is an error in the conveyor belt 2, the position of the printing jig 3 will not be offset, when the printing jig 3 needs to be moved, it is only necessary to disconnect the power supply of the electromagnet 15, so that the limit plate 11 is reset under the elastic action of the extrusion spring 14.

[0042] Example 2: Please refer to Figure 1 , Figure 5 and Figure 6In order to solve the problem that dust adhesion affects ink adhesion during the use of the traditional device, this embodiment provides the following technical solutions, a dust removal mechanism is set, and the dust on the surface of the processed circuit board 4 is cleaned by the dust removal mechanism. Specifically, a longitudinal fixed back plate 5 is fixedly installed at the rear of the upper surface of the working platform 1, and a horizontal printing plate 6 is arranged on the front side of the fixed back plate 5, and a telescopic cylinder 7 is fixedly installed between the printing plate 6 and the fixed back plate 5, an arched dust removal frame 16 is fixedly installed on the right side of the upper surface of the working platform 1, and a dust removal frame 16 is installed inside to remove the processed circuit board 4. The dust removal mechanism for the dust on the surface of the industrial circuit board 4, two smear scrapers 8 are symmetrically and slidably installed on the upper surface of the printing plate 6, and a threaded connection is penetrated between the rear end of the smear scraper 8 and the transmission screw 9, and the transmission screw 9 is driven to rotate by a driving motor 10 fixedly installed on the upper surface of the printing plate 6, the dust removal mechanism includes a pressurized nozzle 17 fixedly installed on the inner side of the dust removal frame 16 and a dust sticking plate 18 made of double-sided adhesive material fixedly installed on the lower surface of the dust removal frame 16, and the pressurized nozzle 17 forms a communication structure with a first air bag 20 fixedly installed on the upper surface of the printing plate 6 through a conveying hose 19.

[0043] After the printing jig 3 reaches the specified position, the telescopic cylinder 7 is turned on, and the printing plate 6 is pushed downward to the position where it fits the processed circuit board 4 by the telescopic cylinder 7. Then, the driving motor 10 is turned on, and the driving motor 10 is used to drive the transmission screw 9 to rotate, so that the transmission screw 9 drives the coating scraper 8 installed with a thread through its outside to move back and forth, and the ink is printed on the surface of the processed circuit board 4. After printing is completed, the telescopic cylinder 7 drives the printing plate 6 to reset upward. At this time, the printing plate 6 is used to squeeze the first air bag 20, so that the air in the first air bag 20 is ejected from the pressurized nozzle 17 through the conveying hose 19, thereby cleaning the dust on the surface of the processed circuit board 4 under the action of the airflow, and the blown dust is adsorbed on the dust sticking plate 18.

[0044] Example 3: Please refer to Figure 1 , Figure 7-10In order to solve the problem that the ink cannot be dried quickly after printing in the traditional device, the present embodiment provides the following technical solutions, wherein a drying mechanism is provided, and the drying mechanism is used to spray hot air to dry the surface of the processed circuit board 4 after printing, so as to accelerate the drying of the ink. Specifically, a drying rack 21 is fixedly installed on the left side of the upper surface of the working platform 1, and a drying mechanism for drying the ink on the surface of the processed circuit board 4 after printing is arranged on the inner side of the drying rack 21. The drying mechanism comprises a drying nozzle 22 rotatably installed at the middle position of the lower surface of the drying rack 21, and the drying nozzle 22 is connected to an output pipe 23, and the other end of the output pipe 23 is connected to a heating box 2 fixedly installed on the outer surface of the front side of the fixed back plate 5. 4 are interconnected, and a heating tube structure is fixedly installed inside the heating box 24. The heating box 24 forms a connecting structure with a second air bag 26 fixedly installed on the upper surface of the printing plate 6 through an input pipe 25 fixedly installed on the front side thereof. A friction roller 27 and a driving bevel gear 28 are rotatably installed on the inner side wall of the drying rack 21, and the driving bevel gear 28 is connected to the friction roller 27 through a first belt 29, and the friction roller 27 is in contact with the upper surface of the conveyor belt 2 for friction. A driven bevel gear 30 is rotatably installed on the inner side of the upper end of the drying rack 21, and the driven bevel gear 30 is meshed with the driving bevel gear 28, and the driven bevel gear 30 drives the drying nozzle 22 to rotate synchronously through the second belt 31.

[0045] The printing plate 6 synchronously squeezes the second airbag 26 during the upward movement, so that the air in the second airbag 26 enters the interior of the heating box 24 through the input pipe 25, and the heating box 24 is used to heat the air. The heated air is ejected from the drying nozzle 22 through the output pipe 23, so that the ink printed on the surface of the processed circuit board 4 is dried by the hot air. In this process, the conveyor belt 2 rotates to drive the friction roller 27 to rotate by the surface friction force. The friction roller 27 drives the active bevel gear 28 to rotate by the first belt 29 during the rotation. At this time, the active bevel gear 28 drives the driven bevel gear 30 meshing with it to rotate synchronously, so that the driven bevel gear 30 drives the drying nozzle 22 to rotate under the action of the second belt 31, thereby expanding the drying area and making the overall drying more uniform.

Claims

1. A circuit board processing printer with a limited conveying structure, comprising a work platform (1) placed horizontally on the ground, a conveyor belt (2) rotatably mounted on the upper surface of the work platform (1), characterized in that: Also includes: Two limit strips (201) are fixedly mounted on the outer surface of the conveyor belt (2), a dedicated printing jig (3) is placed at equal intervals on the upper surface of the conveyor belt (2), and a processed circuit board (4) to be printed is clamped inside the printing jig (3), and a limit mechanism for ensuring that the position of the printing jig (3) does not deviate is arranged on the upper surface of the working platform (1); A longitudinally arranged fixed back plate (5) is fixedly installed at the rear of the upper surface of the working platform (1), a transversely arranged printing plate (6) is arranged at the front side of the fixed back plate (5), and a telescopic cylinder (7) is fixedly installed between the printing plate (6) and the fixed back plate (5); An arched dust removal frame (16) is fixedly mounted on the right side of the upper surface of the working platform (1), and a dust removal mechanism for removing dust from the surface of the processed circuit board (4) is mounted on the inner side of the dust removal frame (16); A drying rack (21) is fixedly mounted on the left side of the upper surface of the working platform (1), and a drying mechanism for drying ink on the surface of the printed circuit board (4) is arranged inside the drying rack (21).

2. A circuit board processing printer with a position limiting conveying structure according to claim 1, characterized in that: Two smear scrapers (8) are symmetrically and slidably mounted on the upper surface of the printing plate (6), and a threaded connection is passed through the rear end of the smear scrapers (8) and a transmission screw (9), and the transmission screw (9) is driven to rotate by a drive motor (10) fixedly mounted on the upper surface of the printing plate (6).

3. A circuit board processing printer with a position limiting conveying structure according to claim 1, characterized in that: The limiting mechanism comprises two limiting plates (11) which are symmetrical in front and back, and the positions of the limiting plates (11) are aligned with the position of the printing plate (6) in the vertical direction, and the limiting plates (11) form an elastic telescopic structure with the working platform (1) through a compression spring (14) fixedly mounted on the outer surface of the limiting plates (11).

4. A circuit board processing printer with a position limiting conveying structure according to claim 3, characterized in that: Two engaging balls (12) are rotatably mounted inside the limiting plate (11), and the engaging balls (12) are engaged with engaging holes (13) provided on the side of the printing jig (3), and an electromagnet (15) is fixedly mounted in the middle of the outer surface of the limiting plate (11).

5. A circuit board processing printer with a position limiting conveying structure according to claim 1, characterized in that: The dust removal mechanism comprises a pressurized nozzle (17) fixedly mounted on the inner side of the dust removal frame (16) and a dust sticking plate (18) made of double-sided adhesive material fixedly mounted on the lower surface of the dust removal frame (16), and the pressurized nozzle (17) forms a communication structure with a first air bag (20) fixedly mounted on the upper surface of the printing plate (6) via a conveying hose (19).

6. A circuit board processing printer with a position limiting conveying structure according to claim 1, characterized in that: The drying mechanism comprises a drying nozzle (22) rotatably mounted at the middle position of the lower surface of the drying frame (21), and the drying nozzle (22) and the output pipe (23) are communicated with each other.

7. A circuit board processing printer with a position limiting conveying structure according to claim 6, characterized in that: The other end of the output pipe (23) is in communication with a heating box (24) fixedly mounted on the front outer surface of the fixed back plate (5), and a heating pipe structure is fixedly mounted inside the heating box (24).

8. A circuit board processing printer with a position limiting conveying structure according to claim 7, characterized in that: The heating box (24) forms a communication structure with the second air bag (26) fixedly mounted on the upper surface of the printing plate (6) through an input pipe (25) fixedly mounted on the front side of the heating box (24).

9. A circuit board processing printer with a position limiting conveying structure according to claim 6, characterized in that: A friction roller (27) and a driving bevel gear (28) are rotatably mounted on the inner side wall of the drying rack (21), and the driving bevel gear (28) and the friction roller (27) are connected via a first belt (29), and the friction roller (27) is in contact with and rubbed against the upper surface of the conveyor belt (2).

10. A circuit board processing printer with a position limiting conveying structure according to claim 9, characterized in that: A driven bevel gear (30) is rotatably mounted on the inner side of the upper end of the drying rack (21), and the driven bevel gear (30) and the driving bevel gear (28) are meshed with each other, and the driven bevel gear (30) drives the drying nozzle (22) to rotate synchronously through a second belt (31).

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